LG G2 - stuck in accessibility mode, knock code can't be entered

A

AC Question

Hello everyone! I can't unlock my LG G2 phone, because I am unable to enter my normal "knock code" pattern, which comes up when I boot the phone. The problem happened because I have turned on "accessibility mode" in the settings (for no reason, just to see what the mode does). Then I restarted my phone.

In this mode I can't just tap my knock code normally; the phone is sluggish and vibrates a bit at each tap. I tried double tapping or "doing it slow" - no help.

I suppose this sluggishness (and vibration) is a normal feature of the Accessibility Mode, but I don't know how to use this mode. It's the first time I turned it on. So, my phone is stuck at the knock code input screen. Could anyone advise me, how to unlock my phone?

Best,
Jay